如图所示,将两个表面光滑的铅块相互紧压后,它们会黏在—起,说

如图所示,将两个表面光滑的铅块相互紧压后,它们会黏在—起,说明了             .小明从滑梯上滑下,速度越来越快,臀部有热呼呼的感觉,则他的机械能            (增大/不变/减小)

答案

分子间存在相互作用的引力。

相关题目

The film A World Without Thieves          a great success and brought i
The film A World Without Thieves          a great success and brought in a large profit to the cinema. A.was enjoyed           B.enjoyed          C.is enjoyed   
鸡蛋壳的主要成分是碳酸钙。为了测定某鸡蛋壳中碳酸钙的
鸡蛋壳的主要成分是碳酸钙。为了测定某鸡蛋壳中碳酸钙的质量分数,小群同学进 行了如下实验:将鸡蛋壳洗净、干燥并捣碎后,称取10g放在烧杯里,
在原电池中,较活泼的金属发生       反应,是      
在原电池中,较活泼的金属发生       反应,是       极;活动性较差的金属极上发生        反应,是       极。潮湿空气中钢铁表面容
合成橡胶是以___________为原料制成的高分子化合物,具有______
合成橡胶是以___________为原料制成的高分子化合物,具有___________等性能。常用的合成橡胶有___________、___________、___________等。
已知函数 ,方程有6个不同的实数解,则的取值范围是( 
已知函数 ,方程有6个不同的实数解,则的取值范围是(  ) A.           B.           C.          D.
Recently Peter________to do his homework, and instead insists on wasting his tim
Recently Peter________to do his homework, and instead insists on wasting his time playing com-puter games, which extremely annoys his father. A. had been refusing      B. has been refusing  C. w
 函数的最大值是   ▲   。
 函数的最大值是   ▲   。
He has left his book here on _____, so that you can read it.    A. purpose  
He has left his book here on _____, so that you can read it.    A. purpose    B. intention    C. aim    D. meaning

最新题目